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  1. 773
      app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeByJSoup.kt

773
app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeByJSoup.kt
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package io.legado.app.model.analyzeRule
//通用的规则切分处理
class RuleAnalyzer(data: String) {
private var queue: String = data //被处理字符串
private var pos = 0 //处理到的位置
private var start = 0 //每次处理字段的开始
private var step:Int = 0 //分割字符的长度
var elementsType = ""
//当前平衡字段
fun currBalancedString( stepStart:Int = 1 , stepEnd:Int = 1): String { //stepStart平衡字符的起始分隔字串长度，stepEnd平衡字符的结束分隔字串长度
return queue.substring(start+stepStart,pos-stepEnd) //当前平衡字段
}
import android.text.TextUtils.join
import androidx.annotation.Keep
import org.jsoup.Jsoup
import org.jsoup.nodes.Element
import org.jsoup.select.Collector
import org.jsoup.select.Elements
import org.jsoup.select.Evaluator
import org.seimicrawler.xpath.JXNode
import java.util.*
/**
* Created by GKF on 2018/1/25.
* 书源规则解析
*/
@Keep
class AnalyzeByJSoup(doc: Any) {
companion object {
/**
* "class", "id", "tag", "text", "children"
*/
val validKeys = arrayOf("class", "id", "tag", "text", "children")
//将pos重置为0，方便复用
fun reSetPos() {
pos = 0
}
fun parse(doc: Any): Element {
return when (doc) {
is Element -> doc
is JXNode -> if (doc.isElement) doc.asElement() else Jsoup.parse(doc.toString())
else -> Jsoup.parse(doc.toString())
}
}
//当前拉取字段
fun currString(): String {
return queue.substring(start,pos) //当前拉取到的字段
}
//剩余字串
private fun remainingString(): String {
start = pos
pos = queue.length
return queue.substring(start)
}
private var element: Element = parse(doc)
/**
* pos位置回退
* 获取列表
*/
fun back(num :Int = 0) {
if(num == 0)pos = start //回退
else pos -= num
}
internal fun getElements(rule: String) = getElements(element, rule)
/**
* pos位置后移
* 合并内容列表,得到内容
*/
fun advance(num :Int = 1) {
pos+=num
}
internal fun getString(ruleStr: String) =
if(ruleStr.isEmpty()) null
else getStringList(ruleStr).takeIf { it.isNotEmpty() }?.joinToString("\n")
/**
* 是否已无剩余字符?
* @return 若剩余字串中已无字符则返回true
* 获取一个字符串
*/
val isEmpty: Boolean
get() = queue.length - pos == 0 //是否处理到最后
internal fun getString0(ruleStr: String) = getStringList(ruleStr).let{ if ( it.isEmpty() ) "" else it[0] }
/**
* 检索并返回首字符,但pos不变
* @return 首字符：若为空则为 0 号字符
* 获取所有内容列表
*/
fun peek(): Char { //检索首字符
return if (isEmpty) 0.toChar() else queue[pos]
}
internal fun getStringList(ruleStr: String): List<String> {
/**
* 消耗剩余字串中一个字符。
* @return 返回剩余字串中的下个字符。
*/
fun consume(): Char {
return queue[pos++]
}
val textS = ArrayList<String>()
/**
* 字串与剩余字串是否匹配，不区分大小写
* @param seq 字符串被检查
* @return 若下字符串匹配返回 true
*/
fun matches(seq: String): Boolean {
return queue.regionMatches(pos, seq, 0, seq.length, ignoreCase = true)
}
if (ruleStr.isEmpty()) return textS
/**
* 从剩余字串中拉出一个字符串，直到但不包括匹配序列，或剩余字串用完。
* @param seq 分隔字符 **区分大小写**
* @return 是否找到相应字段。
*/
fun consumeTo(seq: String,setStartPos:Boolean = true): Boolean {
//拆分规则
val sourceRule = SourceRule(ruleStr)
if (sourceRule.elementsRule.isEmpty()) {
textS.add(element.data() ?: "")
} else {
val ruleAnalyzes = RuleAnalyzer(sourceRule.elementsRule)
val ruleStrS = ruleAnalyzes.splitRule("&&","||" ,"%%")
val results = ArrayList<List<String>>()
for (ruleStrX in ruleStrS) {
val temp: List<String>? =
if (sourceRule.isCss) {
val lastIndex = ruleStrX.lastIndexOf('@')
getResultLast(
element.select(ruleStrX.substring(0, lastIndex)),
ruleStrX.substring(lastIndex + 1)
)
} else {
getResultList(ruleStrX)
}
if (!temp.isNullOrEmpty()) {
results.add(temp) //!temp.isNullOrEmpty()时，results.isNotEmpty()为true
if(setStartPos)start = pos //将处理到的位置设置为规则起点
val offset = queue.indexOf(seq, pos)
return if (offset != -1) {
pos = offset
true
} else false
if (ruleAnalyzes.elementsType == "||") break
}
}
if (results.size > 0) {
if ("%%" == ruleAnalyzes.elementsType) {
for (i in results[0].indices) {
for (temp in results) {
if (i < temp.size) {
textS.add(temp[i])
}
}
}
} else {
for (temp in results) {
textS.addAll(temp)
}
}
}
}
return textS
}
/**
* 从剩余字串中拉出一个字符串，直到但不包括匹配序列（匹配参数列表中一项即为匹配），或剩余字串用完。
* @param seq 匹配字符串序列
* @return 成功返回true并设置间隔，失败则直接返回fasle
* 获取Elements
*/
fun consumeToAny(vararg seq:String): Boolean {
private fun getElements(temp: Element?, rule: String): Elements {
start = pos
if (temp == null || rule.isEmpty()) return Elements()
while (!isEmpty) {
val elements = Elements()
for (s in seq) {
if (matches(s)) {
step = s.length //间隔数
return true //匹配就返回 true
val sourceRule = SourceRule(rule)
val ruleAnalyzes = RuleAnalyzer(sourceRule.elementsRule)
val ruleStrS = ruleAnalyzes.splitRule("&&","||","%%")
val elementsList = ArrayList<Elements>()
if (sourceRule.isCss) {
for (ruleStr in ruleStrS) {
val tempS = temp.select(ruleStr)
elementsList.add(tempS)
if (tempS.size > 0 && ruleAnalyzes.elementsType == "||") {
break
}
}
} else {
for (ruleStr in ruleStrS) {
//将原getElementsSingle函数调用的函数的部分代码内联过来，方便简化getElementsSingle函数
val rsRule = RuleAnalyzer(ruleStr)
if( rsRule.peek() =='@' || rsRule.peek() < '!' ) rsRule.advance() // 修剪当前规则之前的"@"或者空白符
val rs = rsRule.splitRule("@")
val el = if (rs.size > 1) {
val el = Elements()
el.add(temp)
for (rl in rs) {
val es = Elements()
for (et in el) {
es.addAll(getElements(et, rl))
}
el.clear()
el.addAll(es)
}
el
}else getElementsSingle(temp,ruleStr)
pos++ //逐个试探
elementsList.add(el)
if (el.size > 0 && ruleAnalyzes.elementsType == "||") {
break
}
}
}
pos = start //匹配失败，位置回退
return false
if (elementsList.size > 0) {
if ("%%" == ruleAnalyzes.elementsType) {
for (i in 0 until elementsList[0].size) {
for (es in elementsList) {
if (i < es.size) {
elements.add(es[i])
}
}
}
} else {
for (es in elementsList) {
elements.addAll(es)
}
}
}
return elements
}
/**
* 从剩余字串中拉出一个字符串，直到但不包括匹配序列（匹配参数列表中一项即为匹配），或剩余字串用完。
* @param seq 匹配字符序列
* @return 返回匹配位置
*/
private fun findToAny(vararg seq:Char): Int {
* 1.支持阅读原有写法，':'分隔索引，!或.表示筛选方式，索引可为负数
*
* 例如 tag.div.-1:10:2 或 tag.div!0:3
*
* 2. 支持与jsonPath类似的[]索引写法
*
* 格式形如 [it,it，。。。] 或 [!it,it，。。。] 其中[!开头表示筛选方式为排除，it为单个索引或区间。
*
* 区间格式为 start:end 或 start:end:step，其中start为0可省略，end为-1可省略。
*
* 索引，区间两端及间隔都支持负数
*
* 例如 tag.div[-1, 3:-2:-10, 2]
*
* 特殊用法 tag.div[-1:0] 可在任意地方让列表反向
*
* */
val start = pos //声明新变量记录临时起始位置，不更改类本身的起始位置
fun findIndexSet( rule:String ): IndexSet {
while (!isEmpty) {
val indexSet = IndexSet()
val rus = rule.trim{ it <= ' '}
for (s in seq) if(queue[pos] == s) return pos //匹配则返回位置
var len = rus.length
var curInt: Int? //当前数字
var curMinus = false //当前数字是否为负
val curList = mutableListOf<Int?>() //当前数字区间
var l = "" //暂存数字字符串
pos++ //逐个试探
val head = rus.last() == ']' //是否为常规索引写法
}
if(head){ //常规索引写法[index...]
pos = start //匹配失败，位置回退
len-- //跳过尾部']'
return -1
}
while (len-- >= 0) { //逆向遍历,可以无前置规则
//其中js只要符合语法，就不用避开任何阅读关键字，自由发挥
fun chompJsBalanced(f: ((Char) -> Boolean?) = {
when (it) {
'{' -> true //开始嵌套一层
'}' -> false //闭合一层嵌套
else -> null
}
} ): Boolean {
start = pos
var depth = 0 //嵌套深度
var bracketsDepth = 0 //[]嵌套深度
var inSingleQuote = false //单引号
var inDoubleQuote = false //双引号
var inOtherQuote = false //js原始字串分隔字符
var regex = false //正则
var commit = false //单行注释
var commits = false //多行注释
do {
if (isEmpty) break
var c = consume()
if (c != '\\') { //非转义字符
if (c == '\'' && !commits && !commit && !regex && !inDoubleQuote && !inOtherQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号
else if (c == '"' && !commits && !commit && !regex && !inSingleQuote && !inOtherQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号
else if (c == '`' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote) inOtherQuote = !inOtherQuote //匹配具有语法功能的'`'
else if (c == '/' && !commits && !commit && !regex && !inSingleQuote && !inDoubleQuote && !inOtherQuote) { //匹配注释或正则起点
c = consume()
when(c){
'/'->commit=true //匹配单行注释起点
'*'->commits=true //匹配多行注释起点
else ->regex=true //匹配正则起点
}
}
else if(commits && c == '*') { //匹配多行注释终点
c = consume()
if(c == '/')commits = false
}
else if(regex && c == '/') { //正则的终点或[]平衡
var rl = rus[len]
if (rl == ' ') continue //跳过空格
when (c) {
'/' -> regex = false//匹配正则终点
if (rl in '0'..'9') l += rl //将数值累接入临时字串中，遇到分界符才取出
else if (rl == '-') curMinus = true
else {
//为了保证当open为（ 且 close 为 ）时，正则中[(]或[)]的合法性。故对[]这对在任何规则中都平衡的成对符号做匹配。
// 注：正则里[(]、[)]、[{]、[}]都是合法的，所以只有[]必须平衡。
'[' -> bracketsDepth++ //开始嵌套一层[]
']' -> bracketsDepth-- //闭合一层嵌套[]
}
curInt = if (l.isEmpty()) null else if (curMinus) -l.toInt() else l.toInt() //当前数字
}
when (rl) {
':' -> curList.add(curInt) //区间右端或区间间隔
if (commits || commit || regex || inSingleQuote || inDoubleQuote || inOtherQuote) continue //语法单元未匹配结束，直接进入下个循环
else -> {
val fn = f(c) ?: continue
if (fn) depth++ else depth-- //嵌套或者闭合
//为保证查找顺序，区间和单个索引都添加到同一集合
if(curList.isEmpty())indexSet.indexs.add(curInt!!)
else{
}else { //转义字符
var next = consume() //拉出被转义字符
if(commit && next == 'n') commit = false //匹配单行注释终点。当前为\,下个为n，表示换行
else if (!commits && !commit && next == '\\') {
consume() //当前为\,下个为\，双重转义中"\\"表示转义字符本身，根据if条件"\\"字串不在注释中，则只能在字串或正则中
next = consume() //拉出下个字符，因为在双重转义的字串或正则中，类似于 \\/ 这样的结构才是转义结构
if(next == '\\')consume() //若为转义字符则继续拉出，因为双重转义中转义字符成对存在,即 \\\\
//列表最后压入的是区间右端，若列表有两位则最先压入的是间隔
indexSet.indexs.add( Triple(curInt, curList.last(), if(curList.size == 2) curList.first() else 1) )
curList.clear() //重置临时列表，避免影响到下个区间的处理
}
if(rl == '!'){
indexSet.split='!'
do{ rl = rus[--len] } while (len > 0 && rl == ' ')//跳过所有空格
}
if(rl == '[') return indexSet.apply {
beforeRule = rus.substring(0, len)
} //遇到索引边界，返回结果
if(rl != ',') break //非索引结构，跳出
}
}
l = "" //清空
curMinus = false //重置
}
}
} while (depth > 0 || bracketsDepth >0) //拉出全部符合js语法的字段
} else while (len-- >= 0) { //阅读原本写法，逆向遍历,可以无前置规则
if(depth > 0 || bracketsDepth >0) start = pos
val rl = rus[len]
if (rl == ' ') continue //跳过空格
return pos > start
}
if (rl in '0'..'9') l += rl //将数值累接入临时字串中，遇到分界符才取出
else if (rl == '-') curMinus = true
else {
/**
* 在双重转义字串中拉出一个规则平衡组
*/
fun chompRuleBalanced(open: Char = '[', close: Char = ']',f: ((Char) ->Boolean?)? = null ): Boolean {
start = pos
var depth = 0 //嵌套深度
var otherDepth = 0 //其他对称符合嵌套深度
var inSingleQuote = false //单引号
var inDoubleQuote = false //双引号
do {
if (isEmpty) break
val c = consume()
if (c != ESC) { //非转义字符
if (c == '\'' && !inDoubleQuote) inSingleQuote = !inSingleQuote //匹配具有语法功能的单引号
else if (c == '"' && !inSingleQuote) inDoubleQuote = !inDoubleQuote //匹配具有语法功能的双引号
if (inSingleQuote || inDoubleQuote) continue //语法单元未匹配结束，直接进入下个循环
if ( c == open )depth++ //开始嵌套一层
else if ( c== close) depth-- //闭合一层嵌套
else if(depth == 0 && f != null) { //处于默认嵌套中的非默认字符不需要平衡，仅depth为0时默认嵌套全部闭合，此字符才进行嵌套
val fn = f(c) ?: continue
if (fn) otherDepth++ else otherDepth--
}
if(rl == '!' || rl == '.' || rl == ':') { //分隔符或起始符
}else { //转义字符
var next = consume() //拉出被转义字符，匹配\/、\"、\'等
if (next == ESC) {
consume() //当前为\,下个为\，双重转义中"\\"表示转义字符本身，根据语法特征当前字段在字串或正则中
next = consume() //拉出下个字符，因为在双重转义的字串或正则中，类似于 \\/ 这样的结构才是转义结构
if(next == ESC)consume() //若为转义字符则继续拉出，因为双重转义中转义字符成对存在,即 \\\\
}
indexSet.indexDefault.add(if (curMinus) -l.toInt() else l.toInt()) // 当前数字追加到列表
if (rl != ':') return indexSet.apply { //rl == '!' || rl == '.'
split = rl
beforeRule = rus.substring(0, len)
}
}else break //非索引结构，跳出循环
l = "" //清空
curMinus = false //重置
}
} while (depth > 0 || otherDepth > 0) //拉出一个平衡字串
return !(depth > 0 || otherDepth > 0) //平衡返回false，不平衡返回true
}
return indexSet.apply{
split = ' '
beforeRule = rus } //非索引格式
}
/**
* 不用正则,不到最后不切片也不用中间变量存储,只在序列中标记当前查找字段的开头结尾,到返回时才切片,高效快速准确切割规则
* 解决jsonPath自带的"&&"和"||"与阅读的规则冲突,以及规则正则或字符串中包含"&&"、"||"、"%%"、"@"导致的冲突
* 获取Elements按照一个规则
*/
tailrec fun splitRule(vararg split: String): Array<String>{ //首段匹配,elementsType为空
private fun getElementsSingle(temp: Element, rule: String): Elements {
if(split.size == 1) {
elementsType = split[0] //设置分割字串
step = elementsType.length //设置分隔符长度
return splitRule(arrayOf()) //仅一个分隔字串时，直接二段解析更快
}else if (!consumeToAny(* split)) return arrayOf(queue) //未找到分隔符
var elements = Elements()
val st = findToAny( '[','(' ) //查找筛选器
val fi = findIndexSet(rule) //执行索引列表处理器
if(st == -1) {
val (filterType,ruleStr) = fi //获取操作类型及非索引部分的规则字串
var rule = arrayOf(queue.substring(0, pos)) //压入分隔的首段规则到数组
// val rulePc = rulePcx[0].trim { it <= ' ' }.split(">")
// jsoup中，当前节点是参与选择的，tag.div 与 tag.div@tag.div 结果相同
// 此处">"效果和“@”完全相同，且容易让人误解成选择子节点，实际并不是。以后不允许这种无意义的写法
elementsType = queue.substring(pos, pos + step) //设置组合类型
pos += step //跳过分隔符
val rules = ruleStr.split(".")
while (consumeToAny(* split)) { //循环切分规则压入数组
rule += queue.substring(start, pos)
pos += step //跳过分隔符
}
elements.addAll(
if(ruleStr.isEmpty()) temp.children() //允许索引直接作为根元素，此时前置规则为空，效果与children相同
else when (rules[0]) {
"children" -> temp.children() //允许索引直接作为根元素，此时前置规则为空，效果与children相同
"class" -> temp.getElementsByClass(rules[1])
"tag" -> temp.getElementsByTag(rules[1])
"id" -> Collector.collect(Evaluator.Id(rules[1]), temp)
"text" -> temp.getElementsContainingOwnText(rules[1])
else -> temp.select(ruleStr)
} )
rule += queue.substring(pos) //将剩余字段压入数组末尾
val indexSet = fi.getIndexs(elements.size) //传入元素数量，处理负数索引及索引越界问题，生成可用索引集合。
return rule
}
if(filterType == '!'){ //排除
val rule = if(st >pos ){ //先匹配到st1pos，表明分隔字串不在选择器中，将选择器前分隔字串分隔的字段依次压入数组
for (pcInt in indexSet) elements[pcInt] = null
var rule = arrayOf(queue.substring(0, pos)) //压入分隔的首段规则到数组
elements.removeAll(listOf(null)) //测试过，这样就行
elementsType = queue.substring(pos, pos + step) //设置组合类型
pos += step //跳过分隔符
}else if(filterType == '.'){ //选择
while (consumeToAny( * split ) && pos < st ) { //循环切分规则压入数组
rule += queue.substring(start, pos)
pos += step //跳过分隔符
}
val es = Elements()
rule
for (pcInt in indexSet) es.add(elements[pcInt])
}else null
elements = es
pos = st //位置推移到筛选器处
val next = if(queue[pos] == '[' ) ']' else ')' //平衡组末尾字符
return if (rule == null) { //rule为空,首段未匹配完成
}
if(!chompRuleBalanced(queue[pos],next)) throw Error(queue.substring(0, start)+"后未平衡") //拉出一个筛选器,不平衡则报错
splitRule(* split) //递归调用首段匹配
return elements
}
} else {
/**
* 获取内容列表
*/
private fun getResultList(ruleStr: String): List<String>? {
val start0 = start //记录当前规则开头位置
if(!chompRuleBalanced(queue[pos],next)) throw Error(queue.substring(0, start)+"后未平衡") //拉出一个筛选器,不平衡则报错
start = start0 //筛选器的开头不是本段规则开头,故恢复开头设置
splitRule(rule) //首段已匹配,但当前段匹配未完成,调用二段匹配
if (ruleStr.isEmpty()) return null
}
var elements = Elements()
}
elements.add(element)
@JvmName("splitRuleNext")
private tailrec fun splitRule(rules:Array<String>): Array<String>{ //二段匹配被调用,elementsType非空(已在首段赋值),直接按elementsType查找,比首段采用的方式更快
val rule = RuleAnalyzer(ruleStr) //创建解析
if (!consumeTo(elementsType,false)) return rules + queue.substring(start) //此处consumeTo(...)开始位置不是规则的开始位置,start沿用上次设置
while( rule.peek() =='@' || rule.peek() < '!' ) rule.advance() // 修剪当前规则之前的"@"或者空白符
val st = findToAny( '[','(' ) //查找筛选器
val rules = rule.splitRule("@") // 切割成列表
if(st == -1) {
var rule = rules + queue.substring(start, pos) //压入本次分隔的首段规则到数组
pos += step //跳过分隔符
while (consumeTo(elementsType)) { //循环切分规则压入数组
rule += queue.substring(start, pos)
pos += step //跳过分隔符
val last = rules.size - 1
for (i in 0 until last) {
val es = Elements()
for (elt in elements) {
es.addAll(getElementsSingle(elt, rules[i]))
}
rule += queue.substring(pos) //将剩余字段压入数组末尾
return rule
elements.clear()
elements = es
}
return if (elements.isEmpty()) null else getResultLast(elements, rules[last])
}
val rule = if(st > pos ){//先匹配到st1pos，表明分隔字串不在选择器中，将选择器前分隔字串分隔的字段依次压入数组
var rule = rules + queue.substring(start, pos) //压入本次分隔的首段规则到数组
pos += step //跳过分隔符
while (consumeTo(elementsType) && pos < st) { //循环切分规则压入数组
rule += queue.substring(start, pos)
pos += step //跳过分隔符
}
rule
}else rules
/**
* 根据最后一个规则获取内容
*/
private fun getResultLast(elements: Elements, lastRule: String): List<String> {
val textS = ArrayList<String>()
try {
when (lastRule) {
"text" -> for (element in elements) {
textS.add(element.text())
}
"textNodes" -> for (element in elements) {
val tn = arrayListOf<String>()
val contentEs = element.textNodes()
for (item in contentEs) {
val temp = item.text().trim { it <= ' ' }
if (temp.isNotEmpty()) {
tn.add(temp)
}
}
textS.add(join("\n", tn))
}
"ownText" -> for (element in elements) {
textS.add(element.ownText())
}
"html" -> {
elements.select("script").remove()
elements.select("style").remove()
val html = elements.outerHtml()
textS.add(html)
}
"all" -> textS.add(elements.outerHtml())
else -> for (element in elements) {
pos = st //位置推移到筛选器处
val next = if(queue[pos] == '[' ) ']' else ')' //平衡组末尾字符
val url = element.attr(lastRule)
val start0 = start //记录当前规则开头位置
if(!chompRuleBalanced(queue[pos],next)) throw Error(queue.substring(0, start)+"后未平衡") //拉出一个筛选器,不平衡时返回true,表示未平衡
start = start0 //筛选器平衡,但筛选器的开头不是当前规则开头,故恢复开头设置
if(url.isEmpty() || textS.contains(url)) break
return splitRule(rule) //递归匹配
textS.add(url)
}
}
} catch (e: Exception) {
e.printStackTrace()
}
return textS
}
data class IndexSet(var split:Char = '.',
var beforeRule:String = "",
val indexDefault:MutableList<Int> = mutableListOf(),
val indexs:MutableList<Any> = mutableListOf()){
/**
* 替换内嵌规则
* @param inner 起始标志,如{$. 或 {{
* @param startStep 不属于规则部分的前置字符长度，如{$.中{不属于规则的组成部分，故startStep为1
* @param endStep 不属于规则部分的后置字符长度，如}}长度为2
* @param fr 查找到内嵌规则时，用于解析的函数
*
* */
fun innerRule( inner:String,startStep:Int = 1,endStep:Int = 1,fr:(String)->String?): String {
fun getIndexs(len:Int): MutableSet<Int> {
val start0 = pos //规则匹配前起点
val indexSet = mutableSetOf<Int>()
val st = StringBuilder()
val lastIndexs = (indexDefault.size - 1).takeIf { it !=-1 } ?: indexs.size -1
while (!isEmpty && consumeTo(inner)) { //拉取成功返回true，ruleAnalyzes里的字符序列索引变量pos后移相应位置，否则返回false,且isEmpty为true
val start1 = start //记录拉取前起点
if(indexs.isEmpty())for (ix in lastIndexs downTo 0 ){ //indexs为空，表明是非[]式索引，集合是逆向遍历插入的，所以这里也逆向遍历，好还原顺序
if (chompRuleBalanced {//拉出一个以[]为默认嵌套、以{}为补充嵌套的平衡字段
when (it) {
'{' -> true
'}' -> false
else -> null
}
}) {
val frv= fr(currBalancedString(startStep,endStep))
if(frv != null) {
st.append(queue.substring(start1,start)+frv) //压入内嵌规则前的内容，及内嵌规则解析得到的字符串
continue //获取内容成功，继续选择下个内嵌规则
val it = indexDefault[ix]
if(it in 0 until len) indexSet.add(it) //将正数不越界的索引添加到集合
else if(it < 0 && len >= -it) indexSet.add(it + len) //将负数不越界的索引添加到集合
}
}
}else for (ix in lastIndexs downTo 0 ){ //indexs不空，表明是[]式索引，集合是逆向遍历插入的，所以这里也逆向遍历，好还原顺序
start = start1 //拉出字段不平衡，重置起点
pos = start + inner.length //拉出字段不平衡，inner只是个普通字串，规则回退到开头，并跳到此inner后继续匹配
if(indexs[ix] is Triple<*, *, *>){ //区间
}
val (startx, endx, stepx) = indexs[ix] as Triple<Int?, Int?, Int> //还原储存时的类型
//匹配前起点与当前规则起点相同，证明无替换成功的内嵌规则,返回空字符串。否则返回替换后的字符串
return if(start0 == start) "" else {
st.append(remainingString()) //压入剩余字符串
st.toString()
}
}
val start = if (startx == null) 0 //左端省略表示0
else if (startx >= 0) if (startx < len) startx else len - 1 //右端越界，设置为最大索引
else if (-startx <= len) len + startx /* 将负索引转正 */ else 0 //左端越界，设置为最小索引
// /**
// * 匹配并返回标签中的属性键字串（字母、数字、-、_、:）
// * @return 属性键字串
// */
// fun consumeAttributeKey(start:Int = pos): String {
// while (!isEmpty && (Character.isLetterOrDigit(queue[pos]) || matchesAny('-', '_', ':'))) pos++
// return queue.substring(start, pos)
// }
// fun splitRule(query:String,item:String = "other",listItem:String = "allInOne"):String{
//
// val cuurItem = item //当前项类型，list->列表项 mulu->章节列表项 url->链接项 search->搜索链接项 find发现链接列表项 other->其他项
// val cuurList = listItem//当前界面总列表项类型，allInOne，json，xml，kotin，java
// var Reverse = false //是否反转列表
//
// consumeWhitespace() //消耗开头空白
// var fisrt = consume() //拉出并消费首字符
//
// when(item){
// "search" ->
// "find" ->
// "mulu" -> if(fisrt == '-'){
// Reverse=true //开启反转
// consumeWhitespace() //拉出所有空白符
// fisrt = consume() //首字符后移
// }
// else ->
//
// }
//
// return query
// }
val end = if (endx == null) len - 1 //右端省略表示 len - 1
else if (endx >= 0) if (endx < len) endx else len - 1 //右端越界，设置为最大索引
else if (-endx <= len) len + endx /* 将负索引转正 */ else 0 //左端越界，设置为最小索引
companion object {
/**
* 转义字符
*/
private const val ESC = '\\'
if (start == end || stepx >= len) { //两端相同，区间里只有一个数。或间隔过大，区间实际上仅有首位
/**
* 阅读共有分隔字串起始部分
* "##","@@","{{","{[","<js>", "@js:"
*/
val splitList =arrayOf("##","@@","{{","{[","<js>", "@js:")
indexSet.add(start)
continue
/**
* 发现‘名称-链接’分隔字串
* "::"
*/
const val splitListFaXian = "::"
}
/**
* 目录专有起始字符
* "-"
*/
const val splitListMulu = "-"
val step = if (stepx > 0) stepx else if (-stepx < len) stepx + len else 1 //最小正数间隔为1
/**
* 结果为元素列表的 all in one 模式起始字符
* "+"
*/
const val splitListTongYi = "+"
//将区间展开到集合中,允许列表反向。
indexSet.addAll(if (end > start) start..end step step else start downTo end step step)
/**
* 结果为元素列表的项的同规则组合结构
* "||","&&","%%"
*/
val splitListReSplit = arrayOf("||","&&","%%")
}else{//单个索引
/**
* js脚本结束字串
* "</js>"
*/
const val splitListEndJS = "</js>"
val it = indexs[ix] as Int //还原储存时的类型
/**
*内嵌js结束字串
* "}}"
*/
const val splitListEndInnerJS = "}}"
if(it in 0 until len) indexSet.add(it) //将正数不越界的索引添加到集合
else if(it < 0 && len >= -it) indexSet.add(it + len) //将负数不越界的索引添加到集合
/**
* 内嵌规则结束字串
* "]}"
*/
const val splitListEndInnerRule = "]}"
}
/**
* '[', ']', '(', ')','{','}'
*/
val splitListPublic = charArrayOf('[', ']', '(', ')','{','}')
}
/**
* '*',"/","//",":","::","@","|","@xpath:"
*/
val splitListXpath = arrayOf("*","/","//",":","::","@","|","@xpath:")
return indexSet
/**
* '*','$',".","..", "@json:"
*/
val splitListJson = arrayOf('*','$',".","..", "@json:")
}
/**
* '*',"+","~",".",",","|","@","@css:",":"
*/
val splitListCss = arrayOf('*',"+","~",".",",","|","@","@css:",":")
}
/**
* "-",".","!","@","@@"
*/
val splitListDefault = arrayOf("-",".","!","@","@@")
internal inner class SourceRule(ruleStr: String) {
var isCss = false
var elementsRule: String = if (ruleStr.startsWith("@CSS:", true)) {
isCss = true
ruleStr.substring(5).trim { it <= ' ' }
} else {
ruleStr
}
}
}

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